[A health status study of the population subjected to combined exposures to ionizing and nonionizing radiation factors]. / Niakoi aspekti na izsledvane na zdravnoto sustoianie na naselenieto, podlozheno na kombinirani vuzdeistviia s ionizirashti i neionizirashti faktori.

The values of the dose effective extrinsic and intrinsic radiation of humans in the regions near to urane mines and urane plants in Bulgaria are pointed out. Some aspects of investigation of the health and risk evaluation of the population and of the former workers are reviewed.

[Dental caries with chronic renal insufficiency]. / Zuben karies pri detsa s khronichna bubrechna nedostatuchnost.

Chronic renal insufficiency (CRI) is an irreversible lesion of the renal function with advancing of renal rickets, dyselectrolythemia, azotemic osteodystrophia in the bones. On the background of all those severe changes in organism, low indices of dental caries epidemicty are cited in literature. A total of 30 children with CRI were examined: Group 1--21 children with disease onset immediately after birth and duration from 5 to 15 years and group 2--9 children with disease onset after the age of 7 and duration from 2 to 5 years. The intensity of caries and epidemicty were compared according to milk and permanent teeth with a group of healthy children (900). A four-time higher urea level was established in group 1, reduced calcium and increased phosphorus. The children with CRI were less affected by dental caries as compared with the healthy ones, being better manifested in case of an earlier onset and longer duration of the disease. The problem of the future is the explanation of the phenomenon observed and the results--used in prophylasxis.